Authors:

Benjamin Emerson(Georgia Institute of Technology)

Tim Lieuwen(Georgia Institute of Technology)

The fluid mechanics of swirling jets are highly three-dimensional, but most
state of the art measurement capabilities are only planar. This work
demonstrates an experimental data analysis methodology for swirling jets.
The methodology is implemented on planar velocity field data to interpret
the dynamical, three-dimensional topology of the velocity field. The
methodology blends physical understanding of reacting swirling jets with
clues that are present in stereoscopic particle image velocimetry data to
infer a helical vortex tube inclination angle. With this inclination angle,
the planar measurement data can be revolved to re-construct the
three-dimensional velocity field.

*This research was partially supported by the Air Force Office of Scientific Research (contract \#FA9550-16-1-0442), contract monitor Dr. Chiping Li.